An investigation of buried, actively-mass-accreting supermassive blackholes through multi-wavelengths observations

• Project/Area Number: 19740109
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: IMANISHI Masatoshi National Astronomical Observatory of Japan, 光赤外研究部, 助教 (00311176)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,800,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥600,000); Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2007: ¥1,200,000 (Direct Cost: ¥1,200,000)
• Keywords: 赤外線観測 / (サブ)ミリ波観測 / 赤外線銀河 / 超巨大ブラックホール / あかり赤外線天文衛星 / スピッツアー赤外線天文衛星 / 野辺山ミリ波干渉計 / ASTEサブミリ望遠鏡 / 天文学 / 超高光度赤外線銀河 / サブミリ波観測 / ASTE望遠鏡 / ミリ波観測 / すばる望遠鏡

Research Abstract

We have performed systematic multi-wavelengths searches for elusive buried mass-accreting supermassive blackholes (=active galactic nuclei ; AGNs) in luminous infrared galaxies, using AKARI, Spitzer, Nobeyama Millimeter Array, and ASTE sub-millimeter telescope. We quantitatively estimated the energetic importance of buried AGNs and found that buried AGNs become more important energetically with increasing galaxy infrared luminosity, observationally suggesting that the AGN-starburst connections are luminosity dependent.

Research Products

• [Journal Article] 「あかり」赤外線天文衛星で探る、塵に埋もれた活動的な超巨大ブラックホール (2010)
  • Author(s): 今西昌俊
  • Journal Title: 天文月報 103 Pages: 20-28
  • NAID: 10027891690
  • Peer Reviewed
• [Journal Article] Spitzer Infrared Low-Resolution Spectroscopic Study of Buried Active Galactic Nuclei in a Complete Sample of Nearby Ultraluminous Infrared Galaxies (2010)
  • Author(s): Imanishi, M., Maiolino, R., Nakagawa, T.
  • Journal Title: ApJ 709 Pages: 801-815
  • Peer Reviewed
• [Journal Article] ASTE Simultaneous HCN (4-3) and HCO+(4-3) Observations of the Two Luminous Infrared Galaxies NGC 4418 and Arp 220 (2010)
  • Author(s): Imanishi, M., Nakanishi, K., Yamada, M., Tamura, Y., Kohno, K.
  • Journal Title: PASJ 62 Pages: 201-209
  • NAID: 10026714284
  • Peer Reviewed
• [Journal Article] A quantitative determination of the AGN content in local ULIRGs through L-band spectroscopy (2010)
  • Author(s): Risaliti, G., Imanishi, M., Sani, E.
  • Journal Title: MNRAS 401 Pages: 197-203
  • Peer Reviewed
• [Journal Article] Spitzer Infrared Low-Resolution Spectroscopic Study of Buried Active Galactic Nuclei in a Complete Sample of Nearby Ultraluminous Infrared Galaxies (2010)
  • Author(s): Imanishi, M., Maiolino, R., Nakagawa, T.
  • Journal Title: Astrophysical Journal 709 Pages: 801-805
  • Peer Reviewed
• [Journal Article] ASTE Simultaneous HCN(4-3)and HCO^+(4-3)Observations of the Two Luminous Infrared Galaxies NGC 4418 and Arp 299 (2010)
  • Author(s): Imanishi, M., Nakanishi, K., Yamada, M., Tamura, Y., Kohno, K.
  • Journal Title: Publications of the Astronomical Society of Japan 62 Pages: 201-209
  • Peer Reviewed
• [Journal Article] A quantitative determination of the AGN content in local ULIRGs through L-band spectroscopy (2010)
  • Author(s): Risaliti, G., Imanishi, M., Sani, E.
  • Journal Title: Monthly Notices of the Royal Astronomical Society 401 Pages: 197-203
  • Peer Reviewed
• [Journal Article] Detections of Water Ice, Hydrocarbons, and 3. 3μm PAH in z ~ 2 ULIRGs (2009)
  • Author(s): Sajina, A., Spoon, H., Yan, L., Imanishi, M., Fadda, D., Elitzur, M.
  • Journal Title: ApJ 703 Pages: 270-284
  • Peer Reviewed
• [Journal Article] Supermassive black hole mass regulated by host galaxy morphology (2009)
  • Author(s): Watabe, Y., Kawakatu, N., Imanishi, M., Takeuchi, T.T.
  • Journal Title: MNRAS 400 Pages: 1803-1807
  • Peer Reviewed
• [Journal Article] Nobeyama Millimeter Interferometric HCN(1-0) and HCO+(1-0) Observations of Further Luminous Infrared Galaxies (2009)
  • Author(s): Imanishi, M., Nakanishi, K., Tamura, Y., Pend, C-H.
  • Journal Title: AJ 137 Pages: 3581-3598
  • Peer Reviewed
• [Journal Article] Luminous Buried Active Galactic Nuclei as a Function of Galaxy Infrared Luminosity Revealed through Spitzer Low-resolution Infrared Spectroscopy (2009)
  • Author(s): Imaishi, M.
  • Journal Title: ApJ 694 Pages: 751-764
  • Peer Reviewed
• [Journal Article] Luminous Buried Active Galactic Nuclei as a Function of Galaxy Infrared Luminosity Revealed through Spitzer Low-resolution Infrared Spectroscopy (2009)
  • Author(s): Imanishi, M.
  • Journal Title: Astrophysical Journal 694 Pages: 751-764
  • Peer Reviewed
• [Journal Article] Detections of Water Ice, Hydrocarbons, and 3.3μm PAH in z～2 ULIRGs (2009)
  • Author(s): Sajina, A., Spoon, H., Yan, L., Imanishi, M., Fadda, D., Elitzur, M.
  • Journal Title: Astrophysical Journal 703 Pages: 270-284
  • Peer Reviewed
• [Journal Article] Supermassive black hole mass regulated by host galaxy morphology (2009)
  • Author(s): Watabe, Y., Kawakatu, N., Imanishi, M., Takeuchi, T.T.
  • Journal Title: Monthly Notices of the Royal Astronomical Society 400 Pages: 1803-1807
  • Peer Reviewed
• [Journal Article] Nobeyama Millimeter Interferometric HCN(1-0) and HCO+(1-0) Observations of Further Luminous Infrared Galaxies (2009)
  • Author(s): Imanishi, M., Nakanishi, K., Ta mura, Y., and Peng, C-H.
  • Journal Title: The Astronomical Journal 137 Pages: 3581-3598
  • Peer Reviewed
• [Journal Article] Luminous Buried Active Galactic Nuclei as a Function of Galaxy Infrared Luminosity Revealed through Spitzer Low-Resolution Infrared Spectroscopy (2009)
  • Author(s): Imanishi, M.
  • Journal Title: The Astrophysical Journal 694 Pages: 751-764
  • Peer Reviewed
• [Journal Article] Systematic Infrared 2. 5-5μm Spectroscopy of Nearby Ultraluminous Infrared Galaxies with AKARI (2008)
  • Author(s): Imanishi, M., Nakagawa, T., Ohyama, Y., Shirahata, M., Wada, T., Onaka, T., Oi, N.
  • Journal Title: PASJ 60
  • Peer Reviewed
• [Journal Article] Spectral decomposition of starbursts and active galactic nuclei in 5-8μm Spitzer-IRS spectra of local ultraluminous infrared galaxies (2008)
  • Author(s): Nardini, E., Risaliti, G., Salvati, M., Sani, E., Imanishi, M., Marconi, A., Maiolino, R.
  • Journal Title: MNRAS 385
  • Peer Reviewed
• [Journal Article] Nuclear/Circumnuclear Starbursts and Active Galactic Nucleus Mass Accretion in Seyfert Galaxies (2008)
  • Author(s): Watabe, Y., Kawakatu, N., Imanishi, M.
  • Journal Title: ApJ 677 Pages: 895-905
  • Peer Reviewed
• [Journal Article] The Subaru/XMM-Newton Deep Survey (SXDS). II. Optical Imaging and Photometric Catalogs (2008)
  • Author(s): Furusawa, H., et al.
  • Journal Title: ApJS 176 Pages: 1-18
  • Peer Reviewed
• [Journal Article] Ice Emission and the Redshifts of Submillimeter Sources (2008)
  • Author(s): Dudley, C.C., Imanishi, M., Maloney, P.R.
  • Journal Title: ApJ 686 Pages: 251-261
  • Peer Reviewed
• [Journal Article] Systematic Infrared 2.5-5 micron Spectroscopy of Nearby Ultraluminous Infrared Galaxies (2008)
  • Author(s): Imanishi, M., Nakagawa, T., Ohyama, Y., Shirahata, M., Wada, T., Onaka, T., and Oi, N..
  • Journal Title: Publications of the Astronomical Society of Japan 60 Pages: 489-515
  • Peer Reviewed
• [Journal Article] Ice Emission and the Redshifts of Submillimeter Sources (2008)
  • Author(s): Dudley, C. C., Imanishi, M., and Maloney, P. R.
  • Journal Title: The Astrophysical Journal 686 Pages: 251-261
  • Peer Reviewed
• [Journal Article] The Subaru/XMM-Newton Deep Survey (SXDS). II. Optical Imaging and Photometric Catalogs (2008)
  • Author(s): Furusawa, H., et.al. (including Imanishi, M.)
  • Journal Title: The Astrophysical Journal Supplement Series 176 Pages: 1-18
  • Peer Reviewed
• [Journal Article] Nuclear/Circumnuclear Starbursts and Active Galactic Nucleus Mass Accretion in Seyfert Galaxies (2008)
  • Author(s): Watabe, Y., Kawakatu, N., and Imanishi, M.
  • Journal Title: The Astrophysical Journal 677 Pages: 895-905
  • Peer Reviewed
• [Journal Article] Spectral decomposition of starbursts and active galactic nuclei in 5-8 micron Spitzer-IRS spectra of local ultraluminous infrared galaxies (2008)
  • Author(s): Nardini, Risaliti, Salvati, Sani, Imanishi, Marconi, & Maiolino
  • Journal Title: Monthly Notices of the Royal Astronomical Society 385
  • Peer Reviewed
• [Journal Article] Nuclear/circumnuclear starbursts and active galactic nuclei mass accretion in Seyfert galaxies (2008)
  • Author(s): Watabe, Kawakatu, & Imanishi
  • Journal Title: Astrophysical Journal (印刷中)
  • Peer Reviewed
• [Journal Article] Ice emission and the redshift of submillimeter sources (2008)
  • Author(s): Dudley, Imanishi, & Maloney
  • Journal Title: Astrophysical Journal (印刷中)
  • Peer Reviewed
• [Journal Article] The Subaru/XMM-Newton Deep Survey(SXDS)-II. Optical imaging and photometric catalog (2008)
  • Author(s): Furusawa, et. al. (including Imanishi)
  • Journal Title: Astrophysical Journal Supplement Series (印刷中)
  • Peer Reviewed
• [Journal Article] A Spitzer IRS Low-Resolution Spectroscopic Search for Buried AGNs in Nearby Ultraluminous Infrared Galaxies: A Constraint on Geometry between Energy Sources and Dust (2007)
  • Author(s): Imanishi, M., Dudley, C.C., Maiolino, R., Maloney, P.R., Nakagawa, T., Risaliti, G.
  • Journal Title: ApJS 171 Pages: 72-100
  • Peer Reviewed
• [Journal Article] Millimeter Interferometric HCN(1-0) and HCO+(1-0) Observations of Luminous Infrared Galaxies (2007)
  • Author(s): Imanishi, M., Nakanishi, K., Tamura, Y., Oi, N., Kohno, K.
  • Journal Title: AJ 134 Pages: 2366-2384
  • Peer Reviewed
• [Journal Article] Dust covering factor, silicate emission, and star formation in luminous QSOs (2007)
  • Author(s): Maiolino, R., Shemmer, O., Imanishi, M., Netzer, H., Oliva, E., Lutz, D., Sturm, E.
  • Journal Title: A&A 468 Pages: 979-992
  • Peer Reviewed
• [Journal Article] Anticorrelation between the Mass of a Supermassive Black Hole and the Mass Accretion Rate in Type 1 Ultraluminous Infrared Galaxies and Nearby QSOs (2007)
  • Author(s): Kawakatu, N., Imanishi, M., Nagao, T.
  • Journal Title: ApJ 661 Pages: 660-671
  • Peer Reviewed
• [Journal Article] The Mid-Infrared Emission of M87 (2007)
  • Author(s): Perlman, E.S., Mason, R.E., Packham, C., Levenson, N.A., Elitzur, M., Schaefer, J.T., Imanishi, M., Sparks, W.B., Radomski, J.
  • Journal Title: ApJ 663 Pages: 808-815
  • Peer Reviewed
• [Journal Article] A Spitzer IRS low-resolution spectroscopic search for buried AGNs in nearby ultraluminous infrared galaxies-A constraint on geometry between energy sources and dust- (2007)
  • Author(s): Imanishi, Dudley, Maiolino, Maloney, Nakagawa, & Risaliti
  • Journal Title: Astrophysical Journal Supplement Series 171 Pages: 72-100
  • Peer Reviewed
• [Journal Article] Millimeter interferometric HCN(1-0)and HCO+(1-0)observations of luminous infrared galaxies (2007)
  • Author(s): Imanishi, Nakanishi, Tamura, Oi, & Kohno
  • Journal Title: Astronomical Journal 134 Pages: 2366-2384
  • Peer Reviewed
• [Journal Article] Dust covering factor, silicate emission, and star formation in luminous QSOs (2007)
  • Author(s): Maiolino, Shemmer, Imanishi, Netzer, Olive, Lutz, & Sturm
  • Journal Title: Astronomy & Astrophysics 468 Pages: 979-992
  • Peer Reviewed
• [Journal Article] Anticorrelation between the mass of a supermassive blackhole and the mass accretion rate in type 1 ultraluminous infrared galaxies and nearby QSOs (2007)
  • Author(s): Kawakatu, Imanishi, & Nagao
  • Journal Title: Astrophysical Journal 661 Pages: 660-671
  • Peer Reviewed
• [Journal Article] The mid-infrared emission of M87 (2007)
  • Author(s): Perlman, Mason, Packham, Levenson, Elitzur, Schaefer, Imanishi, Sparks, & Radomski
  • Journal Title: Astrophysical Journal 663 Pages: 808-815
  • Peer Reviewed
• [Presentation] すばる/Gemini望遠鏡による、赤外線銀河の20ミクロン高空間分解能撮像観測 (2010)
  • Author(s): 今西昌俊、大井渚、今瀬佳介
  • Organizer: 日本天文学会2010年春季年会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-24
• [Presentation] ASTE WHSFによる赤外線銀河NGC4418、Arp220のHCN(4-3)/HCO+(4-3)輝線の同時観測 (2010)
  • Author(s): 今西昌俊、中西康一郎、田村陽一、山田雅子、河野孝太郎
  • Organizer: 日本天文学会2010年春季年会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-24
• [Presentation] すばる/Gemini望遠鏡による、赤外線銀河の20μm高空間分解能撮像観測 (2010)
  • Author(s): 今西昌俊、大井渚、今瀬佳介
  • Organizer: 日本天文学会 2010年春季年会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-24
• [Presentation] ASTE WHSFによる赤外線銀河NGC4418、Arp220のHCN(4-3)/HCO^+(4-3)輝線の同時観測 (2010)
  • Author(s): 今西昌俊、中西康一郎、田村陽一、山田雅子、河野孝太郎
  • Organizer: 日本天文学会 2010年春季年会
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-24
• [Presentation] ダストに埋もれたAGNと銀河のダウンサイジングの起源への示唆 (2009)
  • Author(s): 今西昌俊、中川貴雄、大山陽一、白旗麻衣、和田武彦、尾中敬、大井渚
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-27
• [Presentation] 野辺山ミリ波干渉計による赤外線銀河の高密度分子ガスの観測:最終サンプル (2009)
  • Author(s): 今西昌俊、中西康一郎、田村陽一、Chih-Han Peng
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-26
• [Presentation] 野辺山ミリ波干渉計による赤外線銀河の高密度分子ガスの観測 : 最終サンプル (2009)
  • Author(s): 今西昌俊、中西康一郎、田村陽一、Peng Ghih-Han
  • Organizer: 日本天文学会2009年春季年会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2009-03-26
• [Presentation] Spitzer赤外線分光観測で探る、塵に埋もれた活動的な超巨大ブラックホール (2008)
  • Author(s): 今西昌俊、Dudley, C.D. 、Maiolino, R., Maloney, P.R. 、中川貴雄, 、Risaliti, G.
  • Organizer: 日本天文学会2008年春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
  • Year and Date: 2008-03-27
• [Presentation] Spitzer赤外線分光観測で探る、塵に埋もれた活動的な超巨大ブラックホール (2008)
  • Author(s): 今西昌俊、Chris Dudley、Roberto Maiolino、Philip Maloney、中川貴雄、Guido Risaliti
  • Organizer: 日本天文学会 2008年春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
  • Year and Date: 2008-03-27
• [Presentation] 赤外線分光/ミリ波干渉計観測で探る、合体赤外線銀河Arp299の各核のエネルギー源 (2008)
  • Author(s): 今西昌俊、中西康一郎
  • Organizer: 日本天文学会2008年春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
  • Year and Date: 2008-03-26
• [Presentation] 赤外線分光/ミリ波干渉計観測で探る、合体赤外線銀河Arp299の各核のエネルギー源 (2008)
  • Author(s): 今西昌俊、中西康一郎
  • Organizer: 日本天文学会 2008年春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
  • Year and Date: 2008-03-26
• [Remarks]
  • URL: http://optik2.mtk.nao.ac.jp/~imanishi/research/research_recent.html
• [Remarks]
  • URL: http://optik2.mtk.nao.ac.jp/~imanishi/research/research_recent.html
• [Remarks]
  • URL: http://optik2.mtk.nao.ac.jp/~imanishi/research/research_recent.html
• [Remarks]
  • URL: http://optik2.mtk.nao.ac.jp/~imanishi/research/research_recent.html